Culligan Medalist (8in) Settings - Too Many Regens

The problem is I seem to go through 40# of Potassium Chloride every 4-6 weeks and I suspect the settings on my Cullilgan Medalist are off. My water use has been consistent since installation with sprinklers and drip in the summer months (17 minutes a day). My stats are this:

Based on a .7ft resin block, the system is rated at 4#/18,300gr, 9#/25,100gr and 12#/27,500gr. A quick calculation gives me 10#/25,900gr. Using a CAPG setting of 280 equates to 2800 gallons when I multiply by 10 (per manual), tells the system to regenerate after processing 2800 gallons of water. Since my water hardness is 7.5gpg, I multiply 2800 gallons by 7.5gpg giving a result of 21000 grains. Since my salt setting (sltp) is 10, the system can process 25,900 grains...max. That gives the system some room before reaching the max. I will makes adjustments to this number over the next few months depending on the quality of the softened water based on my initial calculations.

Also, the Brine Draw/Slow Rinse Time (br) of 71 is OK. A setting of 60-65 is typical.

And to answer my initial question of too many regens...the answer is no. With a CAPG setting of 120 or 1200 gallons and water usage average of 145g/day for August gives 8.27 days until a regeneration. That's approximately 4 regens in a month using 10# per regen or 40# per month. As expected based on the settings and usage.

I have noticed that the water has not been soft in the shower (no slippery feel on skin), but no water marks/deposits on dishes or anything else for that matter. Not sure why that is but I will clean the brine tank soon to eliminate that as a variable.